diff options
Diffstat (limited to 'src/machine-id-setup/machine-id-setup-main.c')
| -rw-r--r-- | src/machine-id-setup/machine-id-setup-main.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/src/machine-id-setup/machine-id-setup-main.c b/src/machine-id-setup/machine-id-setup-main.c new file mode 100644 index 0000000..b595b2a --- /dev/null +++ b/src/machine-id-setup/machine-id-setup-main.c @@ -0,0 +1,182 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <errno.h> +#include <getopt.h> +#include <stdio.h> +#include <stdlib.h> + +#include "alloc-util.h" +#include "dissect-image.h" +#include "id128-util.h" +#include "log.h" +#include "machine-id-setup.h" +#include "main-func.h" +#include "mount-util.h" +#include "parse-argument.h" +#include "path-util.h" +#include "pretty-print.h" +#include "terminal-util.h" +#include "util.h" + +static char *arg_root = NULL; +static char *arg_image = NULL; +static bool arg_commit = false; +static bool arg_print = false; + +STATIC_DESTRUCTOR_REGISTER(arg_root, freep); +STATIC_DESTRUCTOR_REGISTER(arg_image, freep); + +static int help(void) { + _cleanup_free_ char *link = NULL; + int r; + + r = terminal_urlify_man("systemd-machine-id-setup", "1", &link); + if (r < 0) + return log_oom(); + + printf("%s [OPTIONS...]\n" + "\n%sInitialize /etc/machine-id from a random source.%s\n\n" + " -h --help Show this help\n" + " --version Show package version\n" + " --root=PATH Operate relative to root path\n" + " --image=PATH Operate relative to image file\n" + " --commit Commit transient ID\n" + " --print Print used machine ID\n" + "\nSee the %s for details.\n", + program_invocation_short_name, + ansi_highlight(), + ansi_normal(), + link); + + return 0; +} + +static int parse_argv(int argc, char *argv[]) { + + enum { + ARG_VERSION = 0x100, + ARG_ROOT, + ARG_IMAGE, + ARG_COMMIT, + ARG_PRINT, + }; + + static const struct option options[] = { + { "help", no_argument, NULL, 'h' }, + { "version", no_argument, NULL, ARG_VERSION }, + { "root", required_argument, NULL, ARG_ROOT }, + { "image", required_argument, NULL, ARG_IMAGE }, + { "commit", no_argument, NULL, ARG_COMMIT }, + { "print", no_argument, NULL, ARG_PRINT }, + {} + }; + + int c, r; + + assert(argc >= 0); + assert(argv); + + while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) + + switch (c) { + + case 'h': + return help(); + + case ARG_VERSION: + return version(); + + case ARG_ROOT: + r = parse_path_argument(optarg, true, &arg_root); + if (r < 0) + return r; + break; + + case ARG_IMAGE: + r = parse_path_argument(optarg, false, &arg_image); + if (r < 0) + return r; + break; + + case ARG_COMMIT: + arg_commit = true; + break; + + case ARG_PRINT: + arg_print = true; + break; + + case '?': + return -EINVAL; + + default: + assert_not_reached(); + } + + if (optind < argc) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "Extraneous arguments"); + + if (arg_image && arg_root) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Please specify either --root= or --image=, the combination of both is not supported."); + + return 1; +} + +static int run(int argc, char *argv[]) { + _cleanup_(loop_device_unrefp) LoopDevice *loop_device = NULL; + _cleanup_(umount_and_rmdir_and_freep) char *unlink_dir = NULL; + sd_id128_t id; + int r; + + log_parse_environment(); + log_open(); + + r = parse_argv(argc, argv); + if (r <= 0) + return r; + + if (arg_image) { + assert(!arg_root); + + r = mount_image_privately_interactively( + arg_image, + DISSECT_IMAGE_REQUIRE_ROOT | + DISSECT_IMAGE_VALIDATE_OS | + DISSECT_IMAGE_RELAX_VAR_CHECK | + DISSECT_IMAGE_FSCK | + DISSECT_IMAGE_GROWFS, + &unlink_dir, + &loop_device); + if (r < 0) + return r; + + arg_root = strdup(unlink_dir); + if (!arg_root) + return log_oom(); + } + + if (arg_commit) { + const char *etc_machine_id; + + r = machine_id_commit(arg_root); + if (r < 0) + return r; + + etc_machine_id = prefix_roota(arg_root, "/etc/machine-id"); + r = id128_read(etc_machine_id, ID128_FORMAT_PLAIN, &id); + if (r < 0) + return log_error_errno(r, "Failed to read machine ID back: %m"); + } else { + r = machine_id_setup(arg_root, false, SD_ID128_NULL, &id); + if (r < 0) + return r; + } + + if (arg_print) + puts(SD_ID128_TO_STRING(id)); + + return 0; +} + +DEFINE_MAIN_FUNCTION(run); |